There are micro satellites you can build yourself and have launched. They call them CubeSats and they actually would be perfect for a grassroots rebellion.

You'd have to bribe India or China to launch them, though, and keep the launch secret from the U.S. But in principle, it could be done.

EDIT: A dude responded to me by saying:

I want to know why such an innocuous comment would be removed, unless my conspiracy theory about the major Lemmy nodes being run by shills has some truth to it. Bro only said India and China are corrupt too so we need to look into other launch options. There's no way that violates any rule of any major instance.